Not the person you replied to, but from a privacy perspective Apple won't allow Westerners to disable all network access per-app. Something that's been around in Chinese iOS releases for nearly a decade.

I'd love to use many offline note taking apps, but not if they're liable to randomly upload my notes to a potentially adversarial third party. And the actively privacy-hostile behavior of maintaining a separate branch just to disallow access to this feature is not appreciated.